package com.sdry.utils;

import java.util.Random;

/***

* 得到中文首字母

* @author lxm_09

*/

public class PinyinUtil {

/**

* @param args

*/

public static void main(String[] args) {

String str="我是中国人";

System.out.println("中文首字母："+getPYIndexStr(str,true));

}

/**

* 返回首字母

* @param strChinese

* @param bUpCase

* @return

*/

   public static String getPYIndexStr(String strChinese, boolean bUpCase){

       try{

           StringBuffer buffer = new StringBuffer();

           byte b[] = strChinese.getBytes("GBK");//把中文转化成byte数组

           for(int i = 0; i < b.length; i++){

               if((b[i] & 255) > 128){

                   int char1 = b[i++] & 255;

                   char1 <<= 8;//左移运算符用“<<”表示，是将运算符左边的对象，向左移动运算符右边指定的位数，并且在低位补零。其实，向左移n位，就相当于乘上2的n次方

                   int chart = char1 + (b[i] & 255);

                   buffer.append(getPYIndexChar((char)chart, bUpCase));

                   continue;

               }

               char c = (char)b[i];

               if(!Character.isJavaIdentifierPart(c))//确定指定字符是否可以是 Java 标识符中首字符以外的部分。

                   c = 'A';

               buffer.append(c);

           }

           return buffer.toString();

       }catch(Exception e){

           System.out.println((new StringBuilder()).append("\u53D6\u4E2D\u6587\u62FC\u97F3\u6709\u9519").append(e.getMessage()).toString());

       }

       return null;

   }

   /**

    * 得到首字母

    * @param strChinese

    * @param bUpCase

    * @return

    */

   private static char getPYIndexChar(char strChinese, boolean bUpCase){

       int charGBK = strChinese;

       char result;

       if(charGBK >= 45217 && charGBK <= 45252)

           result = 'A';

       else

       if(charGBK >= 45253 && charGBK <= 45760)

           result = 'B';

       else

       if(charGBK >= 45761 && charGBK <= 46317)

           result = 'C';

       else

       if(charGBK >= 46318 && charGBK <= 46825)

           result = 'D';

       else

       if(charGBK >= 46826 && charGBK <= 47009)

           result = 'E';

       else

       if(charGBK >= 47010 && charGBK <= 47296)

           result = 'F';

       else

       if(charGBK >= 47297 && charGBK <= 47613)

           result = 'G';

       else

       if(charGBK >= 47614 && charGBK <= 48118)

           result = 'H';

       else

       if(charGBK >= 48119 && charGBK <= 49061)

           result = 'J';

       else

       if(charGBK >= 49062 && charGBK <= 49323)

           result = 'K';

       else

       if(charGBK >= 49324 && charGBK <= 49895)

           result = 'L';

       else

       if(charGBK >= 49896 && charGBK <= 50370)

           result = 'M';

       else

       if(charGBK >= 50371 && charGBK <= 50613)

           result = 'N';

       else

       if(charGBK >= 50614 && charGBK <= 50621)

           result = 'O';

       else

       if(charGBK >= 50622 && charGBK <= 50905)

           result = 'P';

       else

       if(charGBK >= 50906 && charGBK <= 51386)

           result = 'Q';

       else

       if(charGBK >= 51387 && charGBK <= 51445)

           result = 'R';

       else

       if(charGBK >= 51446 && charGBK <= 52217)

           result = 'S';

       else

       if(charGBK >= 52218 && charGBK <= 52697)

           result = 'T';

       else

       if(charGBK >= 52698 && charGBK <= 52979)

           result = 'W';

       else

       if(charGBK >= 52980 && charGBK <= 53688)

           result = 'X';

       else

       if(charGBK >= 53689 && charGBK <= 54480)

           result = 'Y';

       else

       if(charGBK >= 54481 && charGBK <= 55289)

           result = 'Z';

       else

           result = (char)(65 + (new Random()).nextInt(25));

       if(!bUpCase)

           result = Character.toLowerCase(result);

       return result;

   }

}